Mechanism for applying adhesive to container sealing flaps



April 30, 1935. F. REID 1,999,480 I MECHANISM FOR APPLYING ADHESIVE TO CONTAINER SEALING FLAPS Filed J uly l0, 1930 2 Sheets-Sheet l F. REID April 30, 1935.

MEHANISM FOR APPLYING ADHESIVE TO CONTAINER SEALING FLA" Filed July l0, 1930 2 Sheet. -Sheet 2 mw ww I N VEN TOR.

Patented Apr. 30, 1935 1,999,480

UNITED STATES PATENT oFFicE MEcnANTsM Foa APPLYING ADHESIVE 'ro comme snALlNG FLAPs Forestus Reid, Cincinnati, Ohio, assignor to The Procter & Gamble Company, Cincinnati, Ohio, a corporation of Ohio Application July 10, 1930, Serial No. 466,974

9 claims. (c1. sai-12) My invention relates to container sealing ma- Figure 2 is an end elevation of. one side of the chines, and particularly to mechanism associated adhesive applying mechanism, it being underwith a sealing machine by which adhesive, parstood that the other side is of constructicularLv silicate,'is applied to the sealing flaps tion.

of the container. 4 y Referring first to Figure 1, a link conveyor I 5 In the art there has been considerable developmoves along a carrier frame 2, and mechanically ment in machines for applying adhesive to the moves the containers through the sealing mechasealing flaps of containers and mechanically foldnism. The conveyor has pusher lugs 3 which lng over the flaps and passing the containers bear against an end of the container and so 1o through pressure belts from which they emerge push the container through the mechanism. 10 in vcompletely sealed condition. While the use Referring to Figure 2, the main drive shaft of silicate of soda` has been attempted in confor the sealing mechanism is indicated at 4. A nection with such sealing machines as an adsprocket 5 mounted on the shaft l may be prohesive, to the best of my knowledge and belief vided with a chain (not shown) by which the n0 one has heretofore evolved a satisfactory shaft is rotated fromany convenient source of 15 mechanism for applying the adhesive which can power, such as an electric motor. On the shaft be used in regular factory operation. In most l I have indicated a. driving sprocket 6 with a plants, when silicate is used for sealing, it is chain l (diagrammatically indicated), which roapplied -with a brush, and the sealing flaps. are tates intermediate gearing indicated at 8, 8a. 2o then folded overA and the container is passed Fromthe gear 8a a chain 9 (diagrammatically 20 through a pressure belt to give the silicate a indicated) drives a sprocket I0 mounted on the change to dry. upper cam shaft II.

One difliculty with the use of silicate as an Referring now to both Figures 1 and 2. it will adhesive medium has been that the mechanical be noted that the shaft Il carries two cams, in-

devices for applying the silicate to the sealing dicated at I2, I3. The'cam I3 controls the 25 flaps has either applied too much silicate, resultmovement of the uted silicate applying roller I4, ing in the adhesive flowing down and damaging and the cam I2 controls the movement of the adthe wrappers of the packages in the container, hesive supplying roller I5 which, it will be noted, or too little silicate, in which case the aps are is mounted in such position that it may be dipped not rmly secured. l into the silicate tank I6, which is mounted on 30 It is the object of my invention to provide adframe members I1 extending up Afrom the carrier hesive applying mechanism in association with frame. a carrier belt and container sealing mechanism A sprocket I8 through a chain I9 (diagramwhichwillapplythe adhesiveinasuiiciently thick matically indicated) actuates an idler sprocket coating to predetermined portions of the sealing 20 mounted on an adjustable bracket 2|. An- 35 flaps, so that a thoroughly tight package will other chain 22 (also diagrammatically indicated) be provided, and so that the silicate will not flow. rotates a sprocket 23 on a shaft 24 which carries down through the opening between the sealing the `adhesive'supply roller I5. The shaft 24 is flaps and cause damage to the wrappers of the journalied in a frame 2li which is pivotally 40 packages in the container. mounted, as indicated at 26, in a bracket 2'! ex- 40 It is further my object to provide adhesive aptending up from the carrier frame. plying mechanism mechanically controlled so The roller I4 which, it will be noted, is of that it positively applies the adhesive to the fluted construction having knurled annular disccontainer flaps in contrast to passing the flaps like members .28 interspaced with loose or annuthrough mechanism in which the flaps come in lar grooves 29, is pivotally mounted as indicated 45 contact with an adhesive applying device. at 30 on an arm 3|. The bell crank arm 32 The above objects and other objects to which which forms part of the arm 3| carries a roller reference will be made in the ensuing description 33 which is in peripheral contact with the cam I. accomplish by that certain combination and I3. There is further a bell crank arm u which arrangement of parts of which I have illustrated extends from the arm 25 and engages the surface 50 a preferred modication. of the cam I2;-

In the drawingsz- Refen'ing to Figure 1, it .will be noted that Figure 1 is a side elevation of the portion of when the roller 3l, which controls the movement the mechanism which applies the adhesive to of the bell crank lever25, 34, engages the high predetermined areas on the sealing naps. point of the cam I2, the supply roller I5 will be 6l container.

elevated from a position dipping within the tank I6. When the roller 35 engages the low point of the cam I2, the supply roller I will dip down into the tank I6. During the movement, under control of the carril I2, the roller I5 dips into the silicate supply tank and is then elevated into peripheralcontact with the roller I4 when silicate is applied to the knurled annular surfaces 28 of the roller' I4. In this position a gear 36, mounted on the shaft 24, engages a gear 31 which is mounted on a shaft 38 which carries the adhesive applying roller I4. When the roller I5 is elevated the gears 36, 31 are in engagement, but when the roller is dipping into the silicate supply tank, the roller I4 is an idler roller.

As containers of usual construction have end sealing naps which are ordinarily folded in first, if the adhesive, particularly silicate, is applied clear across the surface of the side sealing flaps 39 of the container 43, silicate will drip down through the opening between the end sealing flaps and cause damage to the contents of the The mechanism with which my invention is embodied provides means to control the movement of the roller I4 by means of the cam rider 33 and the cam I3 .so that it will be lowered into frictional and peripheral engagement with the upper surface of a side sealing flap 39 during slightly less than half of the interval which it takes for the complete length of the iiap 39 to pass under the roller I4. The roller I4 is then elevated for a brief interval so that no silicate will be applied tothe upper surface of the nap 39 on that portion of the area of the nap which will lie in registry withthe opening between the end iiaps of the container.

After a brief elevation the roller I4 is then lowered and remains in this position during the silicate applying operation.

During the interval between the passage of containers on the conveyor the roller I5 is elevated and transfers a film of silicate to the rollerI 4.

Referring to Figure 2, it will be noted that I have shown a. silicate applying roller 4I which dips within a silicate tank 42 and applies silicate to the inner surface ofA sealing fiaps 43 which close the opening in the container opposite the opening closed by the flaps 39. Since the fluted and knurled roller 4I can be used to apply adhesive from underneath, a silicate supply roller is not required. The roller 4I alternately dips into the tank 42 and is then elevated by means of a cam 44 which has a cam rider 45 which controls the movement of the arm 46 on which the roller 4I is journaled. The arm 46 which carries the silicate applying roller 4I is journaled in the frame as indicated at 41.

I prefer to apply the adhesive in stripes with sufficient thickness of the coating so that when the closure flaps are folded over and pressed down the silicate will spread out and occupy practically the entire surface of the closure flap with the exception of an area about the median line to which it is purposely -not applied. In practice -I have `found the mechanism which I have heretofore describedto be entirely satisfactory. The intermittent application of the silicate to the roller I4 which applies the silicate downwardly prevents the accumulation of a sufficient supply on the roller I4 to cause it to drip oil on the container fi'ap and thus spread on areas of the ap on which it is not necessary for its sealing action. When the container fiapis actually passing under the roller I4 there is no support for the container nap directly underneath the part to which silicate is applied, but a guide plate 48 supports the closure iiap as it is fed underneath the roller. After the application of the silicate the container is fed through the mechanism and .the closure flaps are folded over in the manner usual for such sealing machines.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent. is:-

1. In combination with a conveyor, means for applying a sealing material to closure naps of a container moving on said conveyor comprising a supply of sealing material, a supply roll and an applying roll, said supply roll provided with mechanical means for moving said supply roll from a position immersed in said supply to a position peripherally engaging said applying roller.

2. I n combination with a conveyor, means for applying a sealing material to' closure iiaps of a container moving on said 'conveyor comprising a supply of sealing material, a supply roll and an applying roll, said supply roll provided with mechanical means for moving said supply roll from a position immersed in said supply to a position peripherally engaging said applying roller, said applying roller having a fluted periphery with spaced knurled annular sealing medium applying portions.

3. In combination with a conveyor, means for applying a sealing material to closure flaps of a container moving on said conveyor comprising a supply of sealing material, a supply roll and an applying roll, said supply roll provided with mechanical means for moving said supply roll from a position immersed in said supply to a position peripherally engaging said applying roller, said applying roller adapted to frictionally engage the surface of a container closure flap.

4. In combination with a conveyor, means for applying a sealing materialto closure aps of a container moving on said conveyor comprising a supply of sealing material, a supply roll and an applying roll, said supply roll provided with mechanical means for moving said supply roll from a position immersed in said supply to a position peripherally engaging said applying roller, said applying roller adapted to frictionally engage the surface of a container closure flap, said mechanical means retracting said supply roller from the path of a container closure flap during the passage of said ap over said supply roller.

5. In combination .with a container sealer mechanism for applying silicate in spaced bands along the upper surface of a closure flap -of a container, and means for supplying silicate to said applying means, said supplying means intermittently movable into peripheral engagement with said applying means, and gears which are engaged during the peripheral engagement of said supplying means and said applying means to drive the latter during the supplying of silicate thereto.

6. In combination with a container sealer mechanism for applying silicate in spaced bands along the upper surface of a closure flap of a container, and means for supplying silicate to said applying means, said supplying-means intermittently movable into peripheral engagement with said applying means, and means for moving said applying means out of contact .with a portion of the area of a closure ap of a container during the application of silicate thereto.

7. In combination with a container sealer mechanism for applying silicate in spaced bandsl along the upper surface of a closure flap of acontainer, and means for supplying silicate to said applying means. seid supplying means intermittently movable into peripheral engagement with said applying means, and means for moving said applying means out of contact with a portion of the area oi a closure iiap oi' a container during the application of silicate thereto comprising a be'li crank arm journaling said applying means and a cam ior controlling the movement of said bell crank arm.

8. In combination with the conveyor oi a container sealing machine, conveying containers with their ilaps extended, means above the path oi.'

the tlapsfor applying a sealing medium across said iiapo. and means voccupying said path alternatively with said naps for supplying the medium to said applying means.

9. In combination with the conveyor of a container sealing machine, conveying containers with their ilaps extended, means above the path of the ilaps having a movement to and from said path for interniptedly applying a sealing medium across said sps, and means occupying said path alternatively with said iiaps for supplying the medium to said applying means.

FORESTUS REID. 

